Use of the Android Multi-select button checkbox

<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"     xmlns: tools= "Http://schemas.android.com/tools"     android:layout_width= "Match_parent"      android:layout_height= "Match_parent"     android:paddingbottom= "@dimen/ Activity_vertical_margin "    android:paddingleft=" @dimen/activity_horizontal_margin "     android:paddingright= "@dimen/activity_horizontal_margin"     android: paddingtop= "@dimen/activity_vertical_margin"     android:orientation= "vertical"      tools:context= "Com.sadhu.s01_e09_checkbox. Mainactivity$placeholderfragment " >    <CheckBox          android:id= "@+id/eatid"         android:layout_ Width= "Wrap_content"         android:layout_height= "wrap_content"         android:text= "Eat"  />     <checkbox         android:id= "@+id/sleepId"         android:layout_width= "Wrap_content"          android:layout_height= "Wrap_content"          Android:text= "Sleeping"  />    <CheckBox          android:id= "@+id/dotaid"         android:layout_width= "wrap _content "        android:layout_height=" Wrap_content "         android:text= "DotA"  />    <CheckBox          android:id= "@+id/allcheckedbox"          android:layoUt_width= "Wrap_content"         android:layout_height= "Wrap_content"         android:text= "Select All" ></CheckBox></LinearLayout>

package com.sadhu.s01_e09_checkbox;import android.app.activity;import android.app.fragment; Import android.os.bundle;import android.view.layoutinflater;import android.view.menu;import  android.view.MenuItem;import android.view.View;import android.view.ViewGroup;import  android.widget.checkbox;import android.widget.compoundbutton;import  Android.widget.compoundbutton.oncheckedchangelistener;import android.view.view.onclicklistener;public  class mainactivity extends activity {//defines three variables private checkbox eatbox; private checkbox sleepbox;private checkbox dotabox;     @Override      protected void oncreate (bundle savedinstancestate)  {         super.oncreate (savedinstancestate);         setcontentview (R.layout.fragment_main);                //found three objects and assigned them to the corresponding variables          eatBox =  (CheckBox) Findviewbyid (R.id.eatid);         sleepBox =   (CheckBox) Findviewbyid (r.id.sleepid);         dotaBox =  (CheckBox) Findviewbyid (r.id.dotaid);                 //This listener is executed after the selected state has changed, two parameters, one is the object and one is checked. Compoundbutton is a super class         checkboxlistener cblistener of a checkbox  = new checkboxlistener ();         Eatbox.setoncheckedchangelistener (Cblistener);         Sleepbox.setoncheckedchangelistener (Cblistener);         Dotabox.setoncheckedchangelistener (Cblistener);                 //defines a listener that changes the state trigger for the Select All button           (CheckBox) Findviewbyid (R.id.allcheckedbox). Setoncheckedchangelistener (New  oncheckedchangelistener ()  {@Overridepublic  void oncheckedchanged (compoundbutton  checkbox, boolean ischecked)  {eatbox.setchecked (isChecked); sleepbox.setchecked (isChecked); Dotabox.setchecked (isChecked);});;                 /*         //Instance Click event Listener Class          Onboxclicklistener onboxclick = new onboxclicklistener ();         //Set the Click event         eatbox.setonclicklistener for three objects ( Onboxclick);         sleepbox.setonclicklistener (OnBoxClick);         dotabox.setonclicklistener (Onboxclick);*/          }    //defines a selected state that is changed to perform such     class checkboxlistener  implements oncheckedchangelistener    {@Overridepublic  void  OnCheckedChanged (compoundbutton buttonview, boolean ischecked)  {if (buttonView.getId () = = R.id.eatid) {System.out.println ("Eatbox");} Else if (Buttonview.getid () ==r.id.sleepid) {System.out.println ("Sleepbox");} Else if (Buttonview.getid () ==r.id.dotaid) {System.out.println ("Dotabox");} if (isChecked) {System.out.println ("checked");} Else{system.out.println ("Unchecked");}}         }        //Define a click event Listener class     /*    class OnBoxClickListener implements  onclicklistener {         @Override      public void onclick (View view)     {     CheckBox box =  (CheckBox) view;    if (Box.getid () ==r.id.eatid)      {    system.out.println ("Eatbox");    }     else if (Box.getid () ==r.id.sleepid)     {     System.out.println ("Sleepbox");     }    else if (Box.getid () = = R.id.dotaid)     {    system.out.println ("DotaBox");     }    if (box.ischecked ())     {     System.out.println ("checked");     }    else    {     system.out.println ("unchecked");     }    }     }*/   &nbSP; @Override     public boolean oncreateoptionsmenu (Menu menu)  {                 // inflate  the menu; this adds items to the action bar if it  is present.        getmenuinflater (). Inflate (R.menu.main,  menu);        return true;    }      @Override     public boolean onoptionsitemselected (MenuItem  item)  {        // Handle action bar  item clicks here. the action bar will         // automatically handle clicks on the Home/Up button, so  long        // as you specify a parent activity in  Androidmanifest.xml.        int id = item.getitemid ();         if  (id == r.id.action_settings)  {             return true;         }        return  Super.onoptionsitemselected (item);    }    /**      * A placeholder fragment containing a simple view.      */    public static class placeholderfragment extends  fragment {        public placeholderfragment ()  {         }         @Override         public view  oncreateview (layoutinflater inflater, viewgroup container,                 bundle savedinstancestate)  {             View rootView =  Inflater.inflate (R.layout.fragment_main, container, false);             return rootview;        }     }}

The Multi-select button checkbox is simple enough to provide a multi-select function for the user, with two listeners, one with the Onclicklistener-click Control triggering the Listener, One is the listener (Oncheckedchangelistener) that executes after the button selection has changed.

Use of the Android Multi-select button checkbox